.content {
  width: 100%;
  margin-top: 10px;
  height: 600px;
  border: 1px solid #ccc;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  grid-template-rows:150px;
  grid-row-gap: 10px;
  grid-column-gap: 10px;
}
